CVE-2011-3152: Canonical Ubuntu Linux

Medium severity, CVSS 6.4. EPSS: 2.3% chance of exploitation in the next 30 days.

DistUpgrade/DistUpgradeFetcherCore.py in Update Manager before 1:0.87.31.1, 1:0.134.x before 1:0.134.11.1, 1:0.142.x before 1:0.142.23.1, 1:0.150.x before 1:0.150.5.1, and 1:0.152.x before 1:0.152.25.5 on Ubuntu 8.04 through 11.10 does not verify the GPG signature before extracting an upgrade tarball, which allows man-in-the-middle attackers to (1) create or overwrite arbitrary files via a directory traversal attack using a crafted tar file, or (2) bypass authentication via a crafted meta-release file.

Affected products

• Canonical Ubuntu Linux: version 8.04 only; version 10.04 only; version 10.10 only; version 11.04 only; version 11.10 only
• Canonical Update-Manager: up to and including 1\:0.87.24; version 1:0.134.7 only; version 1:0.142.19 only; version 1:0.150 only; version 1:0.152.25 only

Published 2014-04-27. Last modified 2026-06-16.